/Engine/Source/Runtime/Core/Public/Containers/RingBuffer.h
Move the value at the given index into the front pointer of the RingBuffer, and shift all elements ahead of it down by one to make room for it. Invalid to call with a negative index or index greater than the number of elements in the RingBuffer.
void ShiftIndexToFront ( [IndexType](API\Runtime\Core\Containers\TRingBuffer\IndexType) Index )